从github安装软件包时出现以下错误：
> devtools::install_github("pmartinezarbizu/pairwiseAdonis/pairwiseAdonis")
Downloading GitHub repo pmartinezarbizu/pairwiseAdonis@HEAD
Erro: Failed to install 'pairwiseAdonis' from GitHub:
System command 'Rcmd.exe' failed, exit status: -1, stdout + stderr empty
使用find_rtools，我收到以下消息（我正在阅读这些帖子，但无法解决我的问题：https://github.com/r-lib/devtools/issues/2031和R CMD check not looking for gcc in Rtools directory）：
> find_rtools(T)
Scanning R CMD config CC...
cc_path:
'' does not exist
Scanning path...
ls: C:\Rtools\bin\ls.exe
gcc_path: C:\Rtools\mingw_64\bin\gcc.exe
VERSION.txt
Rtools version 3.5.0.4
Version: 3.5
Found compatible gcc on path
[1] TRUE
我正在使用R v。3.6。：
> > session_info()
> - Session info -------------------------------------------------------------------------------------
> setting value
> version R version 3.6.3 (2020-02-29)
> os Windows 10 x64
> system x86_64, mingw32
> ui RStudio
> language (EN)
> collate Portuguese_Brazil.1252
> ctype Portuguese_Brazil.1252
> tz America/Sao_Paulo
> date 2020-07-29